Heating Peak-Cut Control; Outdoor Fan Control - Daikin 2MKS40G2V1B Service Manual

Control Specification
4.7

Heating Peak-cut Control

Outline During heating operation, the indoor heat exchanger temperature determines the frequency
upper limit to prevent abnormal high pressure.
Detail
4.8

Outdoor Fan Control

1. Fan OFF delay when stopped
The outdoor fan is turned OFF 60 seconds after the compressor stops.
2. Fan ON control to cool down the electrical box
The outdoor fan is turned ON when the electrical box temperature is high while the compressor
is OFF.
3. Fan OFF control while defrosting
The outdoor fan is turned OFF while defrosting.
4. Fan ON/OFF control when operation starts / stops
The outdoor fan is turned ON when the operation starts. The outdoor fan is turned OFF when
the operation stops.
5. Fan control while forced operation
The outdoor fan is controlled as well as normal operation while the forced operation.
6. Fan speed control while indoor / outdoor quiet operation
The rotation speed of the outdoor fan is reduced by the command of the indoor / outdoor quiet
operation.
7. Fan control when the number of heating room decreases
When the outdoor temperature is more than 10°C, the fan is turned off for 30 seconds.
8. Fan speed control for pressure difference upkeep
The rotation speed of the outdoor fan is controlled for keeping the pressure difference while
cooling with low outdoor temperature.
♦
♦
89
The operating frequency is judged with the indoor heat exchanger temperature 2 minutes
after the operation starts and A seconds after the number of operation room is changed.
The maximum value of the indoor heat exchanger temperature controls the following
(excluding stopped rooms).
A
(seconds)
When increase 30
When decrease 2
When the pressure difference is small, the rotation speed of the outdoor fan is reduced.
When the pressure difference is large, the rotation speed of the outdoor fan is increased.
Indoor heat exchanger
thermistor temperature
SiBE12-816_D
Stop zone
Drooping zone
Keep zone
Up zone
Reset zone
(R4579)
Function and Control